Lathe tool-holder.



H. R. LIEBSTEIN.

LATHE TOOL HOLDER.

APPLICATION HLED OCT- 10. 1913.

1%6LO56, Patented Nov. 23, 1915.

4 K g QMW FFIQEQ HERMANN BOY LIEBSTEINJOF PUTNEY, ENGLAND.

LATHE TOOL-HOLDER.

Specification of Letters Patent.

Patented Nov. 2'3, 1915.

Application filed October 10. 1913. Serial No. 794,470.

To all whom it may concern:

Be it known that I. Harman's Roy Linns'rinx, a subject of the King' of Great Britain and Ireland. residing at Putney, in the 5 county of Surrey, England, have invented certain new and useful Improvements in Lathe Tool-Holders: and I do hereby declare the following to be a full. clear. and exact description of the invention. such as will enable others skilled in the art to which it appertains to make and use the same.

This invention consists in certain improve ments in lathetool holders. the object being to provide means for lessening or preventing the liability which some lathe-tools have.

parting and screw-cutting ones for instance. to digvinto the work, and even to break their own points. To achieve the above mentioned object it has already been proposed to provide a bar steady which presses on the top of the. work. and my present invention comprises an improved form of bar which is moreover adjustably attached to the tool-holder itself, and is set parallel with the direction in which the tool-holder is fed toward the work.

In the accompanying drawing is shown an effective way in which my invention can he carried into practice, Figure 1 being a side View, Fig. 2 a plan, and Fig.3 an end view.

and I may here premise that when in use the bar is set so as justto touch the work when the lathe is at rest. and is also placed sutl iciently on'one side of the tool to cl *ar that part of the work which is being oper ated on.

I provide a tool-holder 1/, the shank of which fits into the lathe tool box in the usual manner, and the. tool c. in the case shown,

40 a cutter, is held in the holder by a plate (1 nesses to he accommodated.

In one face. of the holder (1. is a recess in which is free to slide the tail-piece 7: of the ha 1' steady i at right-angles thereto. the said bar steady having a flat under surface which rests on the top of the work lr. parallel with the direction in which the holder (1 is fed toward the work. The tail-piece h is held to the holder by bolts Z passing through the holder and having straight-sided overhanging heads to slide in rabbets m in the tail-piece h. For the bolts Z may be substituted set-screws n passing through slots 0 in the tailpiece h, into the holder (1. A recess 2 in the under edge of the bar steady enables the bar to be brought low to suit small work without coming in contact with the plate (I. \Vith a tool-holder provided with a bar as above mentioned, overhang from the lathe-tool box is immaterial. and thus the whole length of the tool can be placed in front of the shank of the toolholder. which renders it possible to employ a deep section cutter even in lathes where the; vertical distance between the center of the work and the surface of the tool box on which the shank of the tool-holder rests. is small. which is the case in many English lathes.

\Vhat I claim as my invention and desire to secure by Letters Patent is:-.

In a lathe-tool holding device. the combi nati on of a tool-holder recessed to receive the tool and having a shank to it the lathe-toolhoX: means for retaining the tool in the recess during use: a holding-down bar ha ving a vertical shank to tit a recess in the tool holder. and having a horizontal arm pro jecting from its upper end so as to extend over the work: and bolts passed through the holder and having heads which engage with rabbets in the outer edges of the said vertical shank of the holdingalown bar, as hereinhc'torc described. In testimony whereof. I aflix my signae ture. in presence of two witnesses.

'IIERMANN ROY LIIG'BS'IEIN.

Vi i tncsses TimcY LAY. ()umnoo J. \Vou'rii. 

